fix(deps): update dependency next to v16.1.6

Author: renovate[bot]

form-demo/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "@obosbbl/grunnmuren-react": "workspace:*",
-    "next": "16.1.3",
+    "next": "16.1.6",
     "zod": "4.3.5"
   },
   "devDependencies": {